Which revolutionary product famously eliminated a physical keyboard that was considered essential in its category, creating an entirely new user interface paradigm?

In the world of inventions and discoveries, certain product designs have fundamentally changed how we interact with technology and shaped entire industries. This trivia question focuses on a groundbreaking design choice that seemed counterintuitive at the time but revolutionized user experience forever. Test your knowledge of iconic product design decisions that defied conventional wisdom but created lasting innovation legacies!

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The original iPhone (2007)
The Sony Walkman (1979)
The Amazon Kindle (2007)
The Nintendo Wii (2006)